We put forward a two-step route to synthesize vanadium diselenide(VSe_2), a typical transition metal dichalcogenide(TMD). To obtain the VSe_2 film, we first prepare a vanadium film by electron beam evaporation and we ...We put forward a two-step route to synthesize vanadium diselenide(VSe_2), a typical transition metal dichalcogenide(TMD). To obtain the VSe_2 film, we first prepare a vanadium film by electron beam evaporation and we then perform selenization in a vacuum chamber. This method has the advantages of low temperature, is less time-consuming, has a large area, and has a stable performance. At 400?C selenization temperature, we successfully prepare VSe_2 films on both glass and Mo substrates. The prepared VSe_2 has the characteristic of preferential growth along the c-axis, with low transmittance.It is found that the contact between Al and VSe_2/Mo is ohmic contact. Compared to Mo substrate, lower square resistance and higher carrier concentration of the VSe_2/Mo sample reveal that the VSe_2 film may be a potential material for thin film solar cells or other semiconductor devices. The new synthetic strategy that is developed here paves a sustainable way to the application of VSe_2 in photovoltaic devices.展开更多
VSE(Vector Signal Explorer)是R&S公司最新推出的一款基于Windows平台的矢量信号分析软件,支持R&S在售的绝大多数信号与频谱分析仪以及高端示波器RTO。作为一款PC端软件,用户只需要将VSE软件安装在PC上,就可以使用它来控制仪...VSE(Vector Signal Explorer)是R&S公司最新推出的一款基于Windows平台的矢量信号分析软件,支持R&S在售的绝大多数信号与频谱分析仪以及高端示波器RTO。作为一款PC端软件,用户只需要将VSE软件安装在PC上,就可以使用它来控制仪器对输入信号进行分析。除此之外,它还支持使用多个仪器进行并行测量。VSE分析的信号除了可以从仪器输入外,也可以通过IQ数据文件方式输入。VSE通过智能卡方式进行加密,用户可以通过购买相应的软件授权打开相应的功能应用。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.51572132,61674082,and 61774089)the National Key R&D Program of China(Grant No.2018YFB1500202)+3 种基金Tianjin Natural Science Foundation of Key Project,China(Grant Nos.18JCZDJC31200 and 16JCZDJC30700)Yang Fan Innovative and Entrepreneurial Research Team Project,China(Grant No.2014YT02N037)111 Project,China(Grant No.B16027)the International Cooperation Base,China(Grant No.2016D01025)
文摘We put forward a two-step route to synthesize vanadium diselenide(VSe_2), a typical transition metal dichalcogenide(TMD). To obtain the VSe_2 film, we first prepare a vanadium film by electron beam evaporation and we then perform selenization in a vacuum chamber. This method has the advantages of low temperature, is less time-consuming, has a large area, and has a stable performance. At 400?C selenization temperature, we successfully prepare VSe_2 films on both glass and Mo substrates. The prepared VSe_2 has the characteristic of preferential growth along the c-axis, with low transmittance.It is found that the contact between Al and VSe_2/Mo is ohmic contact. Compared to Mo substrate, lower square resistance and higher carrier concentration of the VSe_2/Mo sample reveal that the VSe_2 film may be a potential material for thin film solar cells or other semiconductor devices. The new synthetic strategy that is developed here paves a sustainable way to the application of VSe_2 in photovoltaic devices.
文摘VSE(Vector Signal Explorer)是R&S公司最新推出的一款基于Windows平台的矢量信号分析软件,支持R&S在售的绝大多数信号与频谱分析仪以及高端示波器RTO。作为一款PC端软件,用户只需要将VSE软件安装在PC上,就可以使用它来控制仪器对输入信号进行分析。除此之外,它还支持使用多个仪器进行并行测量。VSE分析的信号除了可以从仪器输入外,也可以通过IQ数据文件方式输入。VSE通过智能卡方式进行加密,用户可以通过购买相应的软件授权打开相应的功能应用。
